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//! \example tutorial-event-keyboard.cpp
#include <visp3/core/vpConfig.h>
#include <visp3/gui/vpDisplayFactory.h>
#ifdef ENABLE_VISP_NAMESPACE
using namespace VISP_NAMESPACE_NAME;
#endif
int main()
{
#if defined(VISP_HAVE_DISPLAY)
vpImage<unsigned char> I(240, 320); // Create a black image
// Initialize the display with the image I. Display and image are now linked together
#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11)
std::shared_ptr<vpDisplay> d = vpDisplayFactory::createDisplay(I, -1, -1, "Keyboard event example", vpDisplay::SCALE_AUTO);
#else
vpDisplay *d = vpDisplayFactory::allocateDisplay(I, -1, -1, "Keyboard event example", vpDisplay::SCALE_AUTO);
#endif
// Set the display background with image I content
vpDisplay::display(I);
// Flush the foreground and background display
vpDisplay::flush(I);
// Wait for keyboard event
std::cout << "Waiting a keyboard event..." << std::endl;
vpDisplay::getKeyboardEvent(I, true);
std::cout << "A keyboard event was detected" << std::endl;
// Non blocking keyboard event loop
int cpt_event = 0;
char key[10];
std::cout << "Enter a non blocking keyboard event detection loop..." << std::endl;
do {
bool event = vpDisplay::getKeyboardEvent(I, &key[0], false);
if (event) {
std::cout << "Key detected: " << key << std::endl;
cpt_event++;
}
vpTime::wait(5); // wait 5 ms
} while (cpt_event < 5);
#if (VISP_CXX_STANDARD < VISP_CXX_STANDARD_11)
delete d;
#endif
#else
std::cout << "No gui available to display an image..." << std::endl;
#endif
return EXIT_SUCCESS;
}
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